package com.sky.service.impl;


import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;

import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;


import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;


import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    OrderMapper orderMapper;
    @Autowired
    UserMapper userMapper;
    @Autowired
    WorkspaceService workspaceService;

    public TurnoverReportVO getturnoverStatistic(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList =new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        List<Double> turnList=new ArrayList<>();
        for (LocalDate date :dateList) {
            //date营业额
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            //select sum（amount) from orders where order_time >?andorder_time <? and status=5
         Map map = new HashMap();
         map.put("begin",beginTime);
         map.put("end",endTime);
         map.put("status", Orders.COMPLETED);
            System.out.println("Map: " + map);
            Double turnover = orderMapper.sumByMap(map);
            System.out.println("Turnover for date " + date + ": " + turnover);
            turnList.add(turnover == null ? 0.0 : turnover);

        }
        return TurnoverReportVO.builder().dateList(StringUtils.join(dateList,",")).turnoverList(StringUtils.join(turnList,",")).build();
    }


    public UserReportVO gettUserStatistic(LocalDate begin, LocalDate end) {
       //存放begin到end之间每天对应的日期
        List<LocalDate> dateList = new ArrayList<>();
        LocalDate currentDate = begin;
        while (!currentDate.isAfter(end)) {
            dateList.add(currentDate);
            currentDate = currentDate.plusDays(1);
        }
        //新增用户数量
        //select count(id) from user where create_time <? create_time >
        List<Integer> newUserList=new ArrayList<>();
        //总用户数量     //select count(id) from user where create_time <?
        List<Integer> totalUserList=new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map<String, Object> map = new HashMap<>();

            map.put("end", endTime);
            Integer totalUser = userMapper.countByMap(map);

            map.put("begin", beginTime);
            Integer newUser = userMapper.countByMap(map);

            System.out.println("Map: " + map);
            System.out.println("Total User for date " + date + ": " + totalUser);
            System.out.println("New User for date " + date + ": " + newUser);

            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }

        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .build();
    }


    public OrderReportVO gettOrdersStatistic(LocalDate begin, LocalDate end) {
        //存放begin到end之间每天对应的日期
        List<LocalDate> dateList = new ArrayList<>();
        LocalDate currentDate = begin;
        while (!currentDate.isAfter(end)) {
            dateList.add(currentDate);
            currentDate = currentDate.plusDays(1);
        }
        //存放每天订单总数
        List<Integer> orderCountLift =new ArrayList<>();
        //存放每天的有效订单数
        List<Integer> vaildOrderCountLift =new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            //查询每天订单总数 select count(id) from user where create_time <? create_time >
            Integer orderCount= getOrderCount(beginTime, endTime, null);
            //有效每天订单数 select count(id) from user where create_time <? create_time > and status=5
            Integer vaildOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            orderCountLift.add(orderCount);
            vaildOrderCountLift.add(vaildOrderCount);
        }
        //计算区间内订单总数量
        Integer integer = orderCountLift.stream().reduce(Integer::sum).get();

        //计算区间内有效订单数量
        Integer Vaildinteger = vaildOrderCountLift.stream().reduce(Integer::sum).get();

        Double orderComple=0.0;
        if (integer!=0)
            orderComple=  Vaildinteger.doubleValue()/integer;
        OrderReportVO build = OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountLift, ","))
                .validOrderCountList(StringUtils.join(vaildOrderCountLift, ","))
                .totalOrderCount(integer)
                .validOrderCount(Vaildinteger)
                .orderCompletionRate(orderComple)
                .build();

        return build;
    }


    public SalesTop10ReportVO getSaleTop10Statistic(LocalDate begin, LocalDate end) {
        //存放begin到end之间每天对应的日期
        List<LocalDate> dateList = new ArrayList<>();
        LocalDate currentDate = begin;
        while (!currentDate.isAfter(end)) {
            dateList.add(currentDate);
            currentDate = currentDate.plusDays(1);
        }
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO > salesTop10=orderMapper.getSalesTop10(beginTime,endTime);
        List<String> name = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> number = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String names = StringUtils.join(name, ",");
        String numbers = StringUtils.join(number, ",");


        return SalesTop10ReportVO.builder().nameList(names)
                .numberList(numbers).build();
    }


    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }



    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
        Map map=new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);
        return orderMapper.countByMap(map);
    }
}
